Led tail light

[Stichill]

For a tail light, I'd say nothing special is required other than correctly wiring it. For turn signals, LED will often cause "hyper flashing" because the current draw causes the flasher module / controller to increase its flashing frequency. So if you are also planning LED turn signals, that will be the problem. The solution is to make sure the turn signals have series resistors to reduce the current draw. Often properly designed LED lamps or modules will include this with the unit.